Governor-valve controller for steam-engines



C. ST. JOHN.

GOVERNOR VALVE CONTROLLER FOR STEAM ENGINES. APPLICATION FILED IAN. 25.1920.

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Patented Oct. 5, 1920. v

c.sT.1oHN. GOVERNOR VALVE CONTROLLER FOR STEAM ENGINES.

APPLICATION FILED IAN. 25, 1920- 1,354,703.

Patented Oct. 5, 1920.

2 SHEETS-SHEET 2.

' a portion of an engine, a portion of a ma- UNITED STATES CLAYTON ST.JOHN, OF MIIMISBURG, OHIO.

Specification of Letters Patent.

GOVERNOR-VALVE CONTROLLER FOR STEAM-ENGINES.

Patented Oct.- V5, 1920.

Appiication inea January 2e, i920. semi No. 354.046.

ToaZZ whomz may concern; Y

Be it known that l, CLAYTON ST. JOHN, a citizen of the United States,residing at hliamisburgn' the county of Montgomery and State of Ohio,have invented certain Vnew and useful Improvements in Governor- ValveControllers for Steam-Engines; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled vin the art to which it appertains to make and use thesame.

rl`liis invention relates to valve-controlling devices, and` morespecifi-cally 'to an improved governor valve-controller for steamengines, and comprises improvements on a valve-controlling mechanismsimilar to that disclosed in the Patent No. 979,289, issued to S. S.Hall on Dec. 2O, 1910.

An object of this invention is to supplenientv the emergency-controlledconnection of said mechanism by another emergencycontrolledl connection,and thereby additionally safe-guarding the speed of the engine. Y

b Another Objectis to'provide an improved speed-controlled attachmentwhichv is eX- ceed'inglysiinple of construction and operation, easilyattachable to an engine and to a machine'driven by the engine, ispositive and instantaneous in its action, adjustable to operate at'different maximum speeds, and adjustable to operate in connection withcontrolling and controlled shafts spaced'various distances from oneanother. Other objects and advantages are pointed out or implied in thefollowing details of description in 'connection with the accompanyingdrawings in which; f

Figure l is a perspective view illustrating chine driven by the engineand, in turn, driving the governor of the engine, and anemergency-controlled valve-controlling mechanism 'including thepresentinvention. `Fig. 2 is a detailv sectional view, the section beingtaken substantially along the line 2 2 of Fig. 1. 'w l Fig. 3 is anenlarged detail view illustrating a portion of the mechanism whichcontrols the governor-valve. y L n l Fig. 4V is a detail sectiona-lview,thek sec- 'tion'being taken substantially along the line 4-"4 of Fig. 3.I

Referring to these drawings in detail, in whichsimilarreference-*characters correspond with similar parts throughout theseveral views, and in which the valve chamber'l, governor 2, and machine3 are of' well lmown construction, the invention consists in theprovision of an attachabletripentension 4 and an attacha-ble rotarytripping deviceV 5 which will be described in detail in connection withthe governor-valvestem 6 and means for controlling the latter inOpposition tothe action of the governor 2. These means will now bespecifically described in connection with the controlling device 4-5 asfollows:

The governorA frame 7 is formed with bearings in which a well known formof valve-.controlling shaft 8 is mounted for rotary or rocking movement,this shaftbeing provided with an arm`9 which engages between a pair ofshoulders 10 of the valve- Vstem 6 in suchv relation that the latter isnormally held up in the position for holding'the valve (not shown) open.The shaft 8 is, in turn, held in this valve-supporting' indicated inFig. 2, the other end being connectedto a ratchet-wheel 12 through theAmedium of a polygonal boss 13, the latter being integral with theratchet-wheel, and this member 12--13 being journaledf on the shaft 8and adapted to be rotated independently of the latter. A pawl 14 isunited with a shaft15, and an arm 16 extends laterally from the shaftand constitutes a trip-arm which is operable to disengage the pawl`14from the ratchet wheel 12, and the trip-extension or tubular attachment4 is adjustablyisecured on the arm 16 by means of a set screw 17 or byother appropriate means. ber 4 is closed by means of a solid headv 18which is preferably rectangular, and this head stands in the path of aVpusher 19 which lis pivotally mounted at 2O on a disk 21, the latterbeing secured by any appropriate means on a portion of a shaft 22 of themachine 8. A spring 24 has one end connected f to lthe pusher 19, itsother end being connected to a screw threaded member 25 which isprovided with a nut 26, the latterbeing cooperative with the member 25for tensioning the spring 24 for a purpose which will presently appear.It is obvious that the rotary tripping device 5 comprises the elements19 to 26 inclusive, and in addition,

The lower end ofthe tubular mem- ,'1hislattershaft coacts with thegovernorfb'e driven by the engine through any approy actuated shaft 32throughthe mediumof a chain 33 and sprocket wheels on the respectiveshafts'l31 andv 32. The `machine 3 may priate means (not shown) so thatthe speed of lthe'machine is controlled by the speed i Yof theY engine,vand on the other hand, the

- [.ti'guous transmission elements.

speed of the engine is controlled by the speed ofthe machine 3l throughthe medium' 0f Vthe, governor-,actuating shaft 32 and the con-Therefore, the governor 2Ycontrols the speed ofthe engine and machineunder normal conditions,

' butin the event of the breaking of abelt or driving chain whichconnectsA the machine to the engine, the-latter will exceed its safespeed limit, and the prior patent (previously referredv to) provides forsuch contingency by employing an-idler 34 which is carried bythe maindriving chain 35 and `by an.' arm 36, the latter being pivotallyvmounted onV the governor frame 7 and carry-- ing a caml37 which ismovable by the arm 36 intoV contact with 'the' trip-extension 4.

` VTherefore,in the event the belt or chain 35 Ythe pawl 14v out ofengagement with the breaks,. the arm 36`swings downward on its -pivot,moving the cam 37 againstv the tripextension 4 andv causing shaft 15 toswing Y ratchet,12, Now, assuming that the ratchet valve stem 6 up), theremoval of the has previously been turned Vforward in the Ydirection ofthe arrow, (so as to tension'the spring 11 and cause thearm 9 to holdthe K pawl 145 from' its engagement with the ratchet- :W-heel effectstherelease of the latter and ,permits it to relax its tensioning effectupon the spring 11. Moreovenwhen the pawl 14 is released, the yactionofjthe spring suddenly rotates the ratchet backward, and this Y.momentumcombines withthe Yweight ofthe jvalve-stem 6to lower the latter so as to`close the ,valvein the chamber 1. Moreover, Aassumingfthat the governoris operating Y gwhenthe-ratchet-wheel'12 is released, the

.resistance of the spring 11 in opposition to the governor 2 isreleased, and thefgovernor 1asslstsin closing the valve or reducing its.outlet to such an extent that the racing of .'theen-gine and machine ischecked.

.f Any appropriate means 'may be provided for securing thevalve in itsvclosing position, after' beingclosed by the means prefvOuslyspecified,"and in this connection,"the 4previously yknown device whichis 'employed .-in'eonnection withthis'V attachment 4 -briefly describedvas follows: Y

A"radially ,extendinggarm 38 is united may be` with the shaft V8l and isprovided with a shoulder 39 which stands inthe path of the vattachment4, and when the latter is moved forward Vby means rof the cam 37, itmoves'against the shoulder 39 and prevents the latter from returning toits normal position, thereby coacting with the` shaft'8 and arm 9inholding the valve-stem down. In this connection, it should be understoodthat the attachment 4 is secured in its engagement with the Shoulder 39by means ofthe Cam'.` t -V l j From the foregoing description, it willbe Yseen that the previously known devices, mentioned herein, areeffective only in the event of the breaking of a certain belt ortransmission member 35, but if the engine races from any othercause,such as by the breaking of another belt, the breaking of a .shaft,-orthe loosening of a pulley on the shaft, the arm 36 cannot swing down toyoperate the valve-controlling mechanism. Therefore, to meet thecontingencies above the, coperating devices 4 and 5, theiirst `beingattachable to and adjustable on lthe `arm`16, and the second beingattachable`r to and adjustable on the shaft 22." VThe adjustment of thedisk V21 ofl the device 5 along the shaft 22 brings the member 19 invposition to move into the path ofthe member 4 provided the latter isproperly adjusted on the arm l16; but it should be understood that theadjustment of the spring l24 also determines whetheror not the member 19moves out sufliciently far, at a given Vrate of speed,to strike and push.the Vmember 4. These relative adjustments are important because it isnot alwayspossible to set the engine and the machine which it drives inVsuch position relative to one'another that the member 19 will strike themember 14 without adjustment of one or the other of these members.v`M0reover, by adfjusting the'member 4 fartherV vaway'from the member 19,a greater speed is required to cause theAv latter to move by centrifugalforce into Contact with' the member 4; and moreover," by increasing thetension ofthe spring 24, 'argreater speed is required to throw themember 19 out into positionfor Vpushing the member 4. f f

It is not intended to limit this invention tothe exact detailsofconstruction and ar-A rangement shown and described, but changes may bemade-within'the scope orV inventive ideas as implied and claimed.' i

. What is claimed asmy invention is:

1; The combinationwith an engine and, an engine-controlling device, thelatter in- 4cluding a governorfcontrolled valve-'stem and means'engag'edwith said valve-stem to control the valve-stem in opposition to saidgovernor, said means including a trip-arm, off an extension att-achableto said trip arm,

a machine operable by said engine and including a rotary shaft, and arotary tripping device attachable to said rotary shaft Yso as to berotated with the latter, said rotary tripping device including pivotallymounted spring-held pusher adapted to be thrown by centrifugal forceintoa position to engage and push said extension of the trip-arm foractuating the latter.l n

2. The combination with an engine and an engine-controlling device, thelatter including a governor-controlled valve-stem and means engaged withsaid valve-stem to control the valve-stem in opposition to saidgovernor, said means including a trip-arm,

of a tubular trip-extension attachable to and adjustable longitudinallyof said arm for extending the latter, said tubular tripextension havingthe free end'portion of said arm seated therein and being provided withmeans to secure it inits different adjustments, and a rotary trippingdevice operable by said engine and including a centrifugally operablepusher to engage with and actuate said trip extension.

3. The combination of a valve-stem, a shaft, a trip-arm on said shaftand operable by the latter to control a valve through the medium of saidvalve-stem, a ratchet-wheel mounted for rotation on and independently ofsaid shaft, a spring` connecting said shaft to said 'atchet-wheel, apawl engaged with said ratchet-wheel, an arm connected to said pawl andoperable to actuate the latter, an adjustable trip-extension on saidarm, and a rotary tripping device including a pusher mounted for outwardmovement into a position to engage with and push the free end of saidadjust-able extension, said pusher being operable by centrifugal forceso that said outward movement varies according to the variations ofspeed of said rotary tripping device, whereby the adjustments of saidtrip-extension provide for its engagement by Vsaid pusher at variousmaximum speeds of said rotary tripping device.

In testimony whereof I have hereunto set my hand.

oLAYToN `sr. JOHN.

